US3334839A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cable reel tension system
Assignee: Westinghouse Air Brake Co
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Filing: 1965-10-22
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Granted: 1967-08-08
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Expires: 1985-10-22
Abstract
No abstract record available.
Inventors
- 👤 Melvin G Carlson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:33
CPC Classifications
B; B66; B66D; B66D1/00; B66D1/28; B66D1/40; B66D1/42; B66D1/44; B66D1/48; B66D1/50; E; E21; E21F; E21F13/00; E21F13/02; E21F13/025; F; F16; F16H; F16H61/00; F16H61/38; F16H61/40; F16H61/4008; F16H61/46
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
IN A FLUID PRESSURE SYSTEM FOR CONTROLLING THE TENSION ON A FLEXIBLE MEMBER WOUND ON AND EXTENDING FROM A REEL DURING THE THREE OPERATING CONDITIONS OF UNWIND, AT REST, AND WIND, MEANS FOR AUTOMATICALLY ESTABLISHING AS MINIMUM, INTERMEDIATE, AND MAXIMUM FLUID PRESSURE IN SAID SYSTEM, WITH SAID MINIMUM PRESSURE BEING EFFECTIVE WHEN THE REEL IS UNWOUND, SAID INTERMEDIATE PRESSURE BEING EFFECTIVE
Claim 2
Dependent Claim
61 words
IN A FLUID PRESSURE SYSTEM FOR CONTROLLING THE TENSION ON A FLEXIBLE MEMBER WOUND ON AND EXTENDING FROM A REEL DURING THE THREE OPERATING CONDITIONS OF UNWIND, AT REST, AND WIND, MEANS FOR AUTOMATICALLY ESTABLISHING AS MINIMUM, INTERMEDIATE, AND MAXIMUM FLUID PRESSURE IN SAID SYSTEM, WITH SAID MINIMUM PRESSURE BEING EFFECTIVE WHEN THE REEL IS UNWOUND, SAID INTERMEDIATE PRESSURE BEING EFFECTIVE
References Cited (Backward Citations)
US2395302A
Cited
US3250492A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-08-07 | 1971-02-06 | 1971-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-07 | 1975-02-06 | 1975-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-07 | 1979-02-06 | 1979-08-08 | $7700.00 | Window Closed / Lapsed |